pescara



Sept. 20, 1932. R. P. PESCARA SAFETY CONTACT DEVICE AUTOIOBILES Filed July 29, 1930 2 Sheets-Sheet 1 Sept. 20, 1932. R. P. PESCARA 1,373,313

SAFETY CONTACT DEVICE FOR AUTOMOBILES Filed July 29, 1930 2 Sheets-Sheet 2 c p i 24 -\3 zro Patented Sept. 20, 1932 RAUL PATERAS PESCARA, F BARCELONA, SPAIN SAFETY CONTACT DEVICE FOR AUTOMOBILES Application filed July 29, 1930, Serial No. 471,576, and in Spain August 8, 1929.

" the engine case is used up.

According to the invention, an obturator device in the form of a piston is disposed at the outlet from the lubricating pump of the engine, which device, when the pressure operates, is forced to be displaced in a co-operating cylinder so as to leave uncovered the communication orifice of the pump with the iubricating piping of the engine.

The displacement of the piston is utilized 8- to establish an electric contact placed outside the engine case and in series with the primar of the ignition the said piston being adj uste by a spring which tends to restore it to its original position when the pressure of the pump ceases; the oil not being able to oppose this movement on account of the feed orifices of the pump itself and of orifices disposed for this purpose through the said piston. This displacement in the inverse direction by the restorin s rin o ens the contact reviously closed.

The transmission of the movement of the piston forming the obturator device situated in the engine casing to the electric contact & placed outside of the said case is preferably by means of a flexible cable guided by a cover. The installation also includes a contact which controls the self starter and simultaneously short-circuits the automatic contact 4.6 device previously mentioned, to permit starting up.

It consists, in addition to these general arrangements, in other more particular arran gements which will be described hereafter and to which naturally will be extended the protection of the present patent. And it may, in, every Way, be well understood, with the aid of that which follows, as well as from the annexed drawings, which are only given, be it '5 well understood, merely by way of example.

Fig. 1 of the said drawings is a view in section of the obturator device and of the contact controlled by the said device as well as of the transmission means from one to the other.

Fig. 2 is a diagrammatic view of the electric installation showing the position of the device which is the object of the present invention.

Fig. 3 is a diagrammatic view of the c0mbined device comprising a starting contact and a contact for short-circuiting the device which is the object of the present invention.

In the construction shown in Fig. 1, the piston 11 moves in the cylinder 12. The said cylinder has an entry conduit 13 for oil which communicates directly with the pump (not shown), and an exit 14 which delivers directly to the lubricating piping of the engine. The piston 11 communicates its movement to it a rod 20 by means of the rod 15 and the flexible cable 16 provided with its cover 17. The connection of the piston 11 to the rod 15 is made without precision, leaving large clearance at 18 so that the mounting may be easily effected in the manufacture of the elements. The end of the cylinder 12 remote from the conduit 13 is closed by a detachable end member.

When the engine starts up, and the oil as pump turns, the pressure at 13 increases instantaneously, being given that the only outlet for oil is obturated or closed by the piston 11 which occupies the full line position indicated in Fig. 1. The said pressure causes the piston 11 to be displaced so as to uncover the outlet orifice 141, and take the position 111, which in Fig. 1 is marked in dotted lines.

At this moment, the rod 20 audits head 25 of insulating material, will'be displaced up to the position (in dotted lines). The insulating head 25, by pressure on the flexible strip 21, will raise this latter to the position 121, and'cause it to make contact with the terminal 22.

It is to be understood that when-the engine stops, and when the oil pressure is annulled, the spring 19 will act through 18 and piston 11 will be brought back to its origifurnishes a ver feeble Jressure of oil. and

the starting up may be retarded. To avoid this, there is provided a multiple contact, which in Fig. 2, bears the number 33. In the said Figure 2, 31 is the battery of accumulators, 32, the coil, the main switch and 29 the contact controlled by the piston 11. When the contact 33 is closed the arrangement is such that 28 is made to communicate with 27, as well as 35 with 26 which closes the circuit of the self starter.

In order that these two contacts may be made simultaneously, a device is utilized which is indicated diagrammatically Fig. 3, on which the numerals correspond with those of Fig. 2. 34 is an insulating substance, ebonite for example. lVhen the pro:- sure acts in the direction of the arrow, the two contacts are closed and they open when the pressure ceases.

The very short time during which the device 29 is short-circuited by the above device is sufficient for the engine to start and for the oil pressure to increase up to the value necessary, to cause the piston to be displaced and close the contact between the two terminals 29 (that is 121 and 22). From this moment, the ignition is effected even after the self starter and short-circuit-ing contact 33 is broken and the engine functions normally. \Vhen the oil pressure is lowered, either because the engine stops, or because the oil of the case is used up, the piston 11 is restored and opens the ignition circuit, and the current from the accumulators is cut off.

What I claim and desire to secure by Letters Patent of the United States of America is 1. A safety contact device for automobile vehicles having an engine including a lubrieating pump system, comprising a cylinder having a closed end with a conduit leading from the oil pump of the engine to the interior of the cylinder, another conduit opening into the side of the cylinder in a position intermediate the ends thereof, a piston mounted to reciprocate in said cylinder, a piston rod connected to the said piston with a large clearance in the connection, the said rod projecting away from the closed end with the conduit, a flexible cable connected to the end of the piston rod, a. cover in which the said flexible cable works, the cover being connected to an end member adapted to be attached to the other end of the cylinder, a spring between the said end member and the piston for keeping the piston pressed towards the end of the cylinder carrying the conduit, that when the pump is not in operation, the piston obturates the passage intermediate the ends of the cylinder, an electric contact making device located outside the engine casing and in series with the primary of the ignition coil, a sliding rod connected to the other end of the flexible cable and located to operate the electrical contact device by its movements, so that by the displacement of the piston in the cylinder by the pressure of the oil, the said sliding rod through the intermediary of the piston rod and flexible cable closes the electric contact, substantially as and for the purposes set forth.

2. A safety contact device for automobile vehicles as claimed in claim 1 and including a multiple starting switch having contacts and leads passing to the self-starting motor and other contacts and leads for short-circuiting the piston operated electric Contact making device, substantially as and for the purposes set forth.

In witness whereof I afiix my signature.

RAUL PATERAS PESCAR-A. 

